Robert Nystrom
d3904f5a54
Change-Id: I6ccbe1494165c2bda142ece13584c4738e3b43e6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425347 Commit-Queue: Lasse Nielsen <lrn@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
59 lines
1.4 KiB
Dart
59 lines
1.4 KiB
Dart
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'package:expect/async_helper.dart';
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import "package:expect/expect.dart";
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import 'dart:async' show Completer, runZonedGuarded, unawaited;
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import 'dart:async' as prefix;
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import 'package:expect/static_type_helper.dart';
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void main() {
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testUnawaited();
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}
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void testUnawaited() {
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// Exists where expected.
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prefix.unawaited.expectStaticType<Exactly<void Function(Future<Object?>?)>>();
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var future = Future<int>.value(42);
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captureStaticType(unawaited(future), <T>(value) {
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Expect.equals(typeOf<void>(), T);
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});
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Future<Never>? noFuture = null;
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unawaited(noFuture); // Doesn't throw on null.
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asyncStart();
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// Unawaited futures still throw.
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{
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var c = Completer<int>();
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var f = c.future;
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unawaited(f);
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asyncStart();
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f.catchError((e) {
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Expect.equals("ERROR1", e);
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asyncEnd();
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return 0;
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});
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c.completeError("ERROR1");
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}
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// Unawaited futures are still uncaught errors.
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{
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asyncStart();
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runZonedGuarded(
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() {
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var c = Completer<int>();
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var f = c.future;
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unawaited(f);
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c.completeError("ERROR2");
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},
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(e, s) {
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Expect.equals("ERROR2", e);
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asyncEnd();
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},
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);
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}
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asyncEnd();
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}
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